Long distance SPI?

Projects Networking, Protocols, and Devices
1

Hi,

I need to connect a RFID (RC522) module with +/- 13m cable.
I use a network cable (cat 5e), which is going well with 8 meters but when I connect a cable of 13m to the MISO port, the connection with both readers is lost.

Does somebody have some experience with this?

I've added my code for sure.

Kind regards,
Marthijn

boom.ino (29.7 KB)

2

It looks like you can get RS232 versions and they should probably work over that length of cable and if not then add a 485 or 422 chip at each end and you should be good for 100m +